icu: update to 59.1

License checksum change due to copyright year update.

Latest icu will not compile with anything less than C++11, so
drop the enforcement of an earlier C++ version. This should be okay,
as there is now a fix in place for the problem of mixing native gcc 4/5
compiled code:
http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=c21cec84886d9c70396e9be0ceb9a8ef300b54be

(From OE-Core rev: b002f44ed5a07b42deb8cccdb192e12091cd654f)

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/distro/include/uninative-flags.inc

@@ -1,7 +1,3 @@
-# icu configure defaults to CXX11 if no -std= option is passed in CXXFLAGS
-# therefore pass one
-BUILD_CXXFLAGS_append_pn-icu-native = " -std=c++98"
-
 # Some distros (ubuntu 16.10, debian-testing) default to gcc configured with
 # --enable-default-pie (see gcc -v). This breaks e.g. prelink-native on a pie
 # default system if binutils-native was built on a system which is not pie default

meta/recipes-support/icu/icu_59.1.bb

@@ -1,6 +1,6 @@
 require icu.inc
 
-LIC_FILES_CHKSUM = "file://../LICENSE;md5=1b3b75c1777cd49ad5c6a24cd338cfc9"
+LIC_FILES_CHKSUM = "file://../LICENSE;md5=fe9e1f2c500466d8f18df2cd068e4b74"
 
 def icu_download_version(d):
     pvsplit = d.getVar('PV').split('.')
@@ -22,8 +22,8 @@ SRC_URI = "${BASE_SRC_URI} \
 SRC_URI_append_class-target = "\
            file://0001-Disable-LDFLAGSICUDT-for-Linux.patch \
           "
-SRC_URI[md5sum] = "fac212b32b7ec7ab007a12dff1f3aea1"
-SRC_URI[sha256sum] = "2b0a4410153a9b20de0e20c7d8b66049a72aef244b53683d0d7521371683da0c"
+SRC_URI[md5sum] = "54923fa9fab5b2b83f235fb72523de37"
+SRC_URI[sha256sum] = "7132fdaf9379429d004005217f10e00b7d2319d0fea22bdfddef8991c45b75fe"
 
 UPSTREAM_CHECK_REGEX = "(?P<pver>\d+(\.\d+)+)/"
 UPSTREAM_CHECK_URI = "http://download.icu-project.org/files/icu4c/"